Bobbin



June 14, 1932. F. w. MQCONNEL ET AL 1,862,694

BOBBIN Filed Dec. 19, 1929 InDntaYS.

Frederic Mo Conne/ and Alfred Hump/vies Patented June 14, 1932 UNETEDSTATES PATENT OFFICE FREDERIC' WHIGHAM MCCONNEL, 0F MARTLEY, AND ALFREDHUMPHBIES, 0F WORCESTER, ENGLAND BOBBIN Application filed December 19,1929, Serial No. 415,299, and in Great Britain December 21, 1928.

The present invention is for improvements in or relating to bobbins,particularly for use with heavy weaving machines, and its object is toprovide a bobbin capable of withstanding rough handling and shockwithout breakmg.

According to the present invention, a bobbin comprises a sleeve and twoflanges and means for resiliently attaching the flanges to the sleeve.Such means preferably comprise a rubber bufl'er interposed between theflanges and the sleeve.

Preferably, the rubber buffer is of annular form and is received in anannular recess in the flange so that only a very small portion of thebuffer is exposed.

One construction according to the invention will V be described withreference to the accompanying drawing, in which Figure 1 is an axialsection through the assembled bobbin;

Figure 2 is an end elevation of the bobbin;

Figure 3 shows a modified form of the sleeve.

Like reference numerals indicate like parts throughout the severalviews.

The various parts of the bobbin to be hereinafter described are forconvenience formed by die casting, although we do not limit ourselves tomanufacture by this method.

The cylindrical spindle 4 of the bobbin is formed in two separatehalves, which are dowelled together. This affords a construction bywhich the parts can be easily trimmed after casting. The spindle 4 ismade hollow for lightness and cheapness. Near each end of the spindle acircumferential shoulder 5 is formed.

Each flange 6 is formed as a shallow dish, the base of which is slightlyconical. Ribs 7 are cast integrally in the concavity of the dish andextend radially between a central integral boss 8 and a flange or rim 9at the outer circumference. The ribs 7 are preferably tapered so as toincrease in thickness (measured circumferentially) as they approach theboss 8. The exterior surface of the conical face 10 of the flange 6which will face inwardly (i. e. towards the companion flange whenassembled), is smooth and continuous with the end of the boss 8. On thissmooth face 10 of the flange 6, there is an annular recess orenlargement of the central aperture into which fits an annular rubberbufler 11. This buffer 11 fits over the spindle 4 and abuts against thecircumferential shoulder 5 thereon, thus limiting inward movement of theflange 6. The flanges 6 are held on to the spindle 4 by spring-rings 12engaging circumferential grooves 13 formed on the spindle 4 between itsends and the shoulders 5.

The aperture in the flange 6 is a slack fit on the spindle 4 and,therefore, a certain amount of relative movement is possible between theflange and the spindle due to the resilience of the rubber ring 11. Thisconstruction renders the bobbin much less liable to breakage whendropped from a height as frequently happens during the use on a weavingmachine.

Each flange 6 is preferably provided with a second annular recess orenlargement of the aperture on its outer face on the bobbin, toaccommodate the spring-ring so that the end of the spindle 4 is flushwith the outside face of the boss 8.

In Figure 3 is illustrated a modified form of spindle for a bobbin. Thespindle 14 as previously described is formed in two separate halveswhich are dowelled together, the diameter of the spindle, however, beingconstant between the shoulders 15 as distinguished from the spindleshown in Figure l in which the diameter is smaller at the middle.

The construction of a bobbin according to this invention is not confinedto the details of construction as described in the foregoing, and is notlimited to use with weaving machines as it may be usefully employed forspools for use with photographic or other films, strips, bands orthreads.

'We claim- 1. A bobbin comprising in combination a sleeve having ashoulder near each end, two opposed end flanges thereon with opposedannular recesses facing one another so as to aflord accommodation for anannular buffer to engage the sleeve and shoulder thereon.

2. A bobbin comprising in combination a sleeve, end flanges thereonwhereof the flanges have a central boss integral with a conical facehaving an outside rim and ribs formed thereon between the boss and therim, the ribs being tapered so as to increase in thickness towards theboss, and resilient buffers which are interposed between said flangesand the sleeve portion and serve as resilient interconnecting supportsbetween the flanges and the sleeve.

3. A bobbin comprising in combination a sleeve provided with a shouldernear each end, two annular rubber buffers to fit thereon and preventedfrom moving too far inwards by the shoulders, two end-flanges providedwith annular recesses to receive the annular bufl'ers, wherein theflanges have a central boss integral with a conical face having anoutside rim and ribs formed thereon between the boss and the rim, theribs being tapered so as to increase in thickness towards the boss, andspring rings for holding the flanges in engagement with the rubberbuffers.

4. A bobbin comprising in combination a cylindrical sleeve provided withshoulders near each end, two annular rubber bufl'ers one to fit overeach end of the sleeve and adapted to butt up against the shoulder atthat end of the sleeve, two end flanges which are provided with annularrecesses in their inner faces to receive the annular bufiers so thatonly a very small portion of each buffer is exposed and spring ringswhich are adapted to register in circumferential grooves formed in thesleeve and which hold the flanges in position against the annular rubberbuffers.

5. A bobbin comprising, in combination, a sleeve having an abutment neareach end, end flanges on the sleeve having opposed recesses facing oneanother, two resilient bufl'ers on the sleeve, one disposed between eachabutment and its flange, and received in a recess provided in thatflange, the resilient buffers serving as resilient interconnectingsupports between the flanges and the sleeves, to cushion the flanges inboth axial and radial directions.

In testimony whereof we have signed our names to this specification.

FREDERIC \VHIGHAM MOCONNEL. ALFRED HUMPHRIES.

